Cell line DNA
Genomic DNA samples were obtained from 5 million cells using the Qiagen DNeasy blood and tissue kit (69504). DNA samples were sequenced using the Novaseq S4 sequencing system (150 bp paired-end reads, over 800 million reads per sample). Reads were trimmed using the cutadapt tool, followed by alignment to the hg38 genome using the Dragen pipeline.